Doing a police procedural in a fantasy setting isn't an entirely new idea in comics. Antony Johnston and Justin Greenwood launched the genre into a fresh orbit last year with The Fuse. Before that, Top 10 and Powers mashed it up with superhero universes. Just last week, the first issue of Si Spurrier and Jeff Stokely's The Spire dragged it into a Jim Henson-esque fantasy world.
Now, with Mercury Heat, Kieron Gillen and Omar Francia have transported the murder mystery far enough into the future that Murder She Wrote is studied as one of the classics, and far enough from Earth to reach the solar system's smallest, hottest planet. This first issue doesn't quite reveal how Mercury Heat is going to stack up against the competition, but it does introduce a fascinating, dense setting.